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A charge q contains n electrons each of ...

A charge q contains n electrons each of mass m. This charge is accelerated under a potential difference V. The speed acquired by the charge is

A

`sqrtfrac(2ev)(m)`

B

`sqrtfrac(2qV)(m)`

C

`sqrtfrac(2e)(mV)`

D

`sqrtfrac(2q)(mnV)`

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